... Specification: Polytetrafluoroethylene (PTFE) membrance has tensile strength good, fine characteristics such as hydrophobic,oleophobic,Air permeable membrane that equalizes pressure, ... electronic control modules, sensors and motors.Character of the PTFE:1)High pressure resistance--Its long-term using temperature is ... strength:10-12kv/mmHeat resistance: +350C Cold resistance: -170C ptfe membrane